Means for harmonizing the rotations of the couch roll and the breast roll of a paper-making machine



WITNESS, M -:.9 M

F. e. WARBURTON. MEANS FOR HARMONIZING THE ROTATIONS OF THE COUCH ROLL AND THE BREAST ROLL OF A PAPER MAKING MACHINE.

APPLICATION FILED APR. 21,1920- I 1,41 0,856. Patented Mar. 28, 1922,

IN V ENTOR.

- UNITED STATES PATENT OFFICE.

'' Fannie. wamwmon, or LONDON, mum.

MEANS- 1'03; nmomzme'mim no'm'rroivs or ran cocci: 30m. AND ran-3mm non. or A PAPER-MAKING- MACHINE. 1

To all whom it may concern: Be it known that I, FRANK G. WAnBtmion, a' subject of the Kin of ,Great Brltain, residin at 1 Prebend lansions, London, ngland, have invented certain new and useful Improvements in Means for Harmonizing the Rotations of the Couch Roll and the Breast Roll of a Paper-Making Machine,"of which the following in a specification.

In a paper-making machine, a couch roll and a breast roll are provided over which passes a woven wire in the form of an endless belt, which receives the paper stock, and therefrom the liquid is removedsufiiciently to prepare a ayer of aper. The run of the belt passes above and below over various devices which create a considerable drag on the belt, which wears out the wire screen in a comparatively short time and as the same is expensive, the wearing out of the wire belt has added very materially to the cost of the paper. Hitherto, so far jas' I am aware, it has'been im ossible to drive the breastroll, although t e driving of the breast roll has been recognized as a desirable object, for the reason that the driving of the breast roll could not .be achieved with due harmony with the couch roll and the result would be an uneven layer of wire on the upper run and-aconsequent destruction of the paper layer formation.

In accordance with my invention the foreoing dilficulties are largely overcome by t e provision of means for correlating the rotations of the 'breast roll in harmony with the couch roll, independent means preferably being provided for driving both the breast roll and the couch roll.

My invention will best be understood by reference to the accompanying drawings, in

which I have shown one embodiment of my invention, and in which Fig. 1 is a diagraminatic view illustrating the couch roll and the breast roll of a paper-making machine and the wire screen or belt passingover the same; Fig. 2 is a diagrammatic view illustrating two independent sources of power for driving the rolls, and the means for correlating the speeds thereof, and Fig. 3 is a detail view of a device for regulatin one of the motors. I

iike reference characters indicate llke parts throughout the drawings;

.Referring nowto the draw ngs, and first here-shown is secured a Mar. 28 1922.

to Fig. 1, 10 isthe couch roll, and 11 the breast roll of a paper-making machine, over which rolls. passes a the lower run of the belt being kept taut by idlers 13. All of the parts i'llustratediin Fig. 1 are well known in paper-making machlnery, and I have accordingly shown the same-in a diagrammatic manner. It will be understood that the paper stock is fed to the upper part of the belt 12 adjacent to the breast roll 11, in the usual manner, and that a layer of the stock is formed on the belt; The liquid gradually flows from the stock through the wire screen as the upper run of-the belt 12 advances towards the couch roll, and the couch-roll itself may or may not be provided with a suction device for further removing the'liquid from the stock to render the layer sufiiciently 'd and compact to be received from the couci wire screen or belt 12,

roll' in the next succeeding paper-making operation.

Now instead of driving the couch roll alone, as has hitherto been the practice, separate devices 14 and 15, which are here illustrated as electric motors, are connected to the couch roll and the breast roll, usually for the purpose of driving the same. I have shown the motor'and the driving connectionsin full at the rightof =Fi 2 in connection withv the roll,11,' whil I liave shown the same partially broken away and have illustrated the electric connections for the motor associated with the couch roll 10 at the left. It is to be understood, however,

that the parts associated with each of the rolls 10 and 11 are or may be the same,

although it will, of course, be understoodthat either of the motors may be more gowerful than the other. I will, therefore, escribe the parts associated onl with the breast roll, t being understood that the parts associated. with thelcoucltroll may be the same or similar. The motor 15 is coupled .to a shaft 16 on which, in the form gear 171 engaging .a gear wheel 18 mounted on the shaft-of the breast roll 11. f

In the embodiment of m invention here illustrated, a regulator 'esignated as l a whole by the numeral 19'is provided for each motor to be controlled, and in the to a master shaft 23, and partly on a sepaform here shown, is mounted partly on a spur shaft 20 connected by' gears 21 and 22 'ofa connected by a I regulator that may rate shaft 24 driven from the motor by'cone pulleys. The master shaft 23 correlatesthc speed of the couch roll and that of the breast roll. The master shaft 23 may be connected to a master motor or either of the motors.14 and 15 may serve as the master motor. The two shafts 20 and 24 are preferably arran ed in alignment, as shown, the two inner en s of the two shafts facing each other.

In'Fig. 3 I have illustrated one form of be used for controlling the speed of the electric motors, and which is the same as that shown in my Patent No. 1,337,573, which issued on or about April 20, 1920. The regulator, here shown, is supported by a suitable framework 25, shafts 20 and 24 having their bearings at 26 and 27 respectively. The shaft 24 is driven, as stated, from its electric motor through cone pulleys 28 and a belt 29', which is longitudinally adjustable on the cone pulleys by means belt-shifting device 30 of known form, so that the speed of rotation of the shaft 24 may be varied with respect to that of its motor. On one of the aligned shafts, and as illustrated on the inner end of the shaft 20, is mounted a commutator 31 having any desired number of metallic segments insulated from each other, and connected to a resistance member 32, Which in the form here shown, rotates with the shaft 20. On the shaft 24 is mounted a brush 33 connected to a collector ring 34 on the shaft 24, as indicated, the collecton'ring, in turn, being conductor 35 to one side of the armature of the electric motor, as diagrammatically indicated in connection with the motor shown at the left in Fig. 2. The resistance member 32 is electrically connected to a collector ring 36 on the shaft 20, the collector ring, in turn, being electrically connected by a conductor 37 to the field 38 of the electric motor, so that any angular variation in rotation between the shafts 20 and 24 will result in a variation in the field of the corresponding motor and bring the rotation of the motor back into harmony with thespeed of theother motor. While I have here illustrated one form of suitable regulator for the motor, it is to be understood that any reliable regulator, such for example as shown in my Patent No. 1,335,357, which issued March 30, 1920, or in my copending application Serial No. 347,898, which was filed on or about December 29, 1919, or that shown in my application Serial No. 368,923, filed on or about March 26, 1920, or any other suitable regulator may be used.

The operation of the device embodying my invention will readil be understood from the foregoing description and is as follows: The required relative speed of the motors 14 and 15, and correspondingly of thecouch roll 10 and the breast roll 11, is

secured by adjusting the belts 29 on the cone pulleys between the motors and the regulators, so that a variation in the relative speeds of the two motors and of the rolls to meet varying operating conditions may readily be secured. In operation, the aligned shafts 20 and 24 will have the same speed of rotation. Now, in case the speed of either of the motors varies for any reason whatever, there will be an angular displacement between the brush arm 33 and the commutator 31 with a resulting variation in the resistance in .circuit with the field 38 of the motor which will act to correct the speed of that motor.

As already indicated, the motors 14 and I 15 driving the couch roll and the breast roll,

desirable to have the m0-' couch roll, take somewhat- What I claim'and desire'to secure by Letters Patent of the United States is 1. In a paper-making machine, a couch roll, a breast roll, and means for correlating the speeds of rotation of said rolls.

2. In apaper-making machine, a couch roll, a breast roll, and means for driving both of said rolls.

3. In a paper-making machine, a couch roll. a breast roll, and separate speed controlled means for driving t e respective rolls. 4. In a paper-making machine, a couch roll, a breast roll, separate speed controlled means for driving 'said rolls, and means for correlating the speeds of said driving means.

5. In a paper-making machine, a couch roll, a breast roll, electric motors for driving the respective rolls, means for regulating the speed of each of said motors, and means for correlating the speeds of said motors.

6. In a paper-making machine, a couch roll, a breast roll, independent means for driving said rolls, means for correlating the speeds of said driving means, and means independent of said correlating means for varying the speed of one of said motors.

7. In a paper-making machine, a couch roll, a breast roll, independent means for driving said rolls, eans for correlating the speeds of said driving means, and means independent of said correlating neans for varying the speed of either of said motors.

FRANK G. WARBURTON. 

